Mike Enslin (first appeared in Everything's Eventual)

Mike is the main character of 1408.

Mike Enslin is mentioned in the following books:

The Dark Tower VII: The Dark Tower (Sep 2004)

Weird but true: this seems like a pretty clear reference to Mike's compulsion in the hotel room in 1408. “Although he was not ordinarily a fussy man, he circled the room, setting them straight. ”

Relentless as ever, a man who always learns to speak the language of the land (at least some of it) and the customs of the country; he is still a man who would straighten pictures in strange hotel rooms.
- Part 5 / Chapter III / Section 1